Use CDN by default for JS SDK Loader (#3213)

Co-authored-by: Hubert Deng <[email protected]>

Author: stayallive

sentry/sentry.conf.example.py

@@ -364,5 +364,12 @@ def get_internal_network():
 
 # CSRF_TRUSTED_ORIGINS = ["https://example.com", "http://127.0.0.1:9000"]
 
+#################
+# JS SDK Loader #
+#################
+
+JS_SDK_LOADER_DEFAULT_SDK_URL = "https://browser.sentry-cdn.com/%s/bundle%s.min.js"
+
+
 # If you would like to use self-hosted Sentry with only errors enabled, please set this
 SENTRY_SELF_HOSTED_ERRORS_ONLY = env("COMPOSE_PROFILES") != "feature-complete"